Mining machine



Aug. 16 1927.

E. C. MORGAN MINING MAcHlNE Filed-Oct. 24, 1921 5 Sheets-Sheet l Aug. 16, 1927. 5' 21,639,050

- E. c. MORGAN MINING MCHINE Filed oet.. 24, 1921 s Smets-sheet 2 Aug.. 16, 1927.

E. MORGAN MINING MACHINE Filed oef., '24, 19.21

M @ZMLL Cil Patented Aug. 16, 1927.

UNITED STATES PATENT oFFicE.

EDMUND C. MORGAN, OF NEW YORK, N. Y.;-OLIVE EUGENIE MORGAN EXECUTRIX OF SAID EDMUND C. MORGAN, DECEASED.

MINING MACHINE.

Application filed October 24, 1921. Serial No. 509,980.

My invention relates to mining machines, and one of its objects is the provision of improved and eflicient mechanism for d igging into and splitting material from a mine vein by a continuous forward rectilinear movement.

A further object of the invention is the provision of improved hydraulic power transmitting mechanism particularly adapted to the operation of ycoal splitting tools although it may have a general application.

A.V further obj-ect of the invention is the provision of hydraulic anchoring and cont-rolling apparatus for mining apparatus.

Other objects of the invention 'will appear hereinafter, the novel features and combinations being set ed claims. n Referring to the accompanying drawings,

Fig. 1 illustrates my invention embodied in a coal mining machine, the machine being shown partly in side elevation and partly in central longitudinal sectional elevation;

Fig. 2 .is a plan view of the mining map chine partly in section;

Fig. 3 is a sectional end elevation of a portion of the anchoring mechanism taken on the line 3--3 of Fig. 1, looking in the direction of the arrows;

Fig. 4 is a section of a portion of Fig. 2 on the line 4 4, looking in the direction of the arrows;

Fig. 5 is a sectional elevation on the line 5-5 of Fig. 2, looking in the direction of the arrows except that the parts have been arranged diagrammatically for the sake of simplicity;

Fig. 6 is a plan view of the hydraulic jack mechanism adapted to be connected to the rear end of the mining machineA shown in Figs. 1 and 2; and

Fig. 7 is a central sectional elevation of the hydraulic jack mechanism shown in Fig. 6.

Referring to Fig. 1 it will be seen that the base frame 8 is adapted to rest on and slide over the mine floor. Mounted on this base frame is a large cylinder 9,' in which is located a plunger 10 having a .semi-spherical bottom. The upper end of the plunger 10 is provided with a recess 11 to receive the low-er support 12 of the roof sho-e 13, which is serrated at 14 on its upper surface. Byical opening means of the valve 15 the supply pipe 16 d rical opening forth in the append- 'supplemental frame ma 1 be connected to the port 17 to direct hydraulic pressure in the cylinder 9 beneath the plunger 10 to force the shoe 13 Vagainst the roof of the mine chamber to securely anchor the cylinder 9 and the base frame 8 in fixed immovable position. By moving the lever 18 to the position shown in Fig. 1 the port 17 may be connected to the exhaust pipe 19 so that the plunger 10 will automatically descend to the position shown in 1 to effect lowering of the shoe 13 away from the roof of the mine chamber.

While the part 9 is provided with a. cylinto constitute the cylinder of the hydraulic roof jack, the outer contour 2O may be square in plan view as shown in Fig. 2, soas to receive the plate 21 shaped to t the outer surface of the frame 9 and slide up and down thereon. The plate frame 21 is frame 24 is a horizontal cylindrical opening 25 to form a hydraulic cylinder. Movable in this cylinder 25 is a plunger 26, which has. a semi-spherical inner end to' fit the semispherical inner end of the cylinder 25, as shown in Fig. 1. i

yRigidlyv secured to the plunger 26 is a which are connected the dislodging tools 29, 30 and 31. The intermediate dislodging tool 30 may extend forward in advance of the floor and roof .dislodging tools 29 and 31 as shown in Fig. 1. While the dislodging tools 29 and 30 are preferably rigidly attached to the supplemental frame 28 so as to move bodily therewith, the uppermost dislodging tool 31 is preferably pivoted at 32 to the supplemental frame 28 so as to be adjustable in elevation.

A hydraulic cylinder 33 is secured to the 28 and provided with a piston 34, the piston rod 35 of which isextended upwardly as shown in Fig. 1. A. link 36 is pivotally connected between the upper end of the plunger 35 and the arm 37 carrying the dislodging tool 31. By means of the valves 38 and 39 the dislodging tool 31 may bev adjusted in elevationY and locked rigidlyl in adjusted position.

' A tertiary frame 40 is secured at 41 to a plunger 42, which extendsinto the cylindri- 43 in-the plunger 26. Connected igidly to the supplemental frame 28 so as .supplemental mining machine frame 28, to

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to move bodily therewith are rearwardly eX- tending arms 44 and 45, the rear ends of which are connected by the cross piece 46 extending under the main frame 24. At the rear end ot' the arm 45 is a floor jack 47, and at the rear end ot the arm 44 are the roof jack and the floor jack 49, as shown in Figs. 2 and 5.

ily referring to Fig. 5 `it will be seen that by means of the valve 50 the supply pipe 5l may be connected to the hydraulic jack 47 so as to litt the arm 45 and the cross piece 4G. By connecting the valve 50 to the eX- haust 52 these parts may be lowered. By means ot the valve 53 the root jack 43 may be operated, and by means otl the valve 54 the floor jaclr 49 may be operated.

It should be noted that the inner plunger 42 is provided with a central longitudinal passageway 55, which communicates with the cylinder 43 and extends forwardly to communicate with a passageway 56 in the tertiary t ame 40. The latter is rigidly connected to the main mining machine frame 24, however, so that the passageway 56 may have direct communication with the passageway 57 leading to the valve 53. Vhen this valve isin the position shown in Fig. 1 cornmunication is established between the supply pipe 59 and the passageway 60 which leads to the righthand end 'of the cylinder l 25. At the same time the passageway 57 is connected through the valve 58 to the eX- haust port 61. lt will thus be seen that when the valve 58 is in the position shown in Fig. 1 the plunger 26 will be moved toward the left to give the dislodging tools rectilinear movement to dislodge material from the mine wall, while the anchored frame 9 acts as a rigid abutment. l/Vhen the plunger 26 moves toward the left the plunger 42 remains stationary and the liquid within the cylinder 43 is forced out through the passageways 55, and 57 to the exhaust port 61. During this operation the licor jacks 47 and 49 may be locked in adjusted position and the roof jack 48 locked in released position.

During the operation orp the dislodging mechanism the valve 62 may occupy the position shown in Fig. 1, so as to cause the hydraulic plunger 63 to act as a brake on the trame 9 to prevent the main frame 24 from sliding up or down out of its adjusted position on the frame 9.

After the dislodging tools have made a forward stroke in accordance with the torward stroke of the plunger 26, the valve 15 ludinal cylindrical opening 72 Now by retaining the root jack 48 in anchored position so as to hold the arms 44 and 45 together with the supplemental trame 23 to which they are attached .in stationary position, the supply pressure exerted through the passageway 55 into the cylinder will cause the plunger 42 to be moved toward the left and carry with it the main trame 24 and the base frame 8, together with the parts mounted on the latter. fitter this adjustment has been made the parts will be restored to t-hc relative positions shown in Fig. 1, whereupon the root jack 43 may be released and the plunger 10 moved upwardly to anchoring position. During the operation ot the dislodging mechanism the plungers 64 and 65 of the floor jacks 47 and 49 may act as guides to maintain the `dislodging tools at the proper elevation.

ln order to facilitate the adj the dislodging tools to 'various accordance with the inclir mine vein, l preter to shape tace oi the i'ramc of the segment ot spending sui-tace 5r, et the baset'rame 3, as shown in Figs. 1 and 3. ii-cuate guideways are provided at (37 and 63 `by means of flanged plates secured to the base trame S, as shown iu Fig. 3. lt will thus be seen that when the hydraulic plungers and 55 are operated to liit er lower the supplemental trame 28, the traine 9 is tree slide on the arcuate surtace 63 V'vf-:hen the root jack 13 is released. rlhe bowl-shaped bottom 12 ot the slice 13 resting in the dish-shaped recrss 11 in the upper end ot the pi nger 10, permits automatic adjnstnicnt or' Vthe shoe 13 when the main trame 24 is tilted upwardly or d-ownvmrdly in accordance with ustment ot vations in iis oi the lower surso as to have the term c dinder iitting a correthe desired changes in direction of the path o t' travel ol the mining machine in its eirtiret-y.

In order to move the entire mining machine shown in F 1 more quickly over thc mine floor to its desired loc tion, the hydraulic transporting mechanism shown in Figs. G and 7 may be connected at to the rear cnd of the baseI frame 3. rlie floor jacks 64 and 65 may be operated to litt the dislodging mechanism so that will have suiiicicnt clearance for free movenie t over the mine floor and the uppermost dislodging tool 31 may be moved to its lower pos ion by operating the hydraulic motorI 33. goth the root ack 43 and the roof jack 13 mayY be in their released positions. rlhe connection to the ears G9 may be detachable as by means ot the pin 70, as shown in Fig. 7. i

rlhe frame 71 is provided. with a longito torni the cylinder tor receiving` the hydraulic plunger 73, having a semi-spherical ht hand cnr portion to lit the corresponding bottom of the cylinder 72. The plunger 73 is rigidly connected to a roof jack 74 comprising a iioor yshoe 75, a cylinder 76, a plunger 77, and a roof shoe 7 8. i

Extending rearwardly from the frame 71 is a frame 79, which carries a rear abutment 8O adapted to engage a mine wall for an anchorage when desired.

Extending forwardly from the abutment 80 is a plunger81, which fits into the cylinder 82 on the interior of the plunger 73.

By means of a valve 83 the supply pipe 84 may be connected to the passa-geways 85 and 8G to simultaneously move the frame 71 to 'the right and the plunger 77 upwardly.

` passageway 88,

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as Viewed in Fig.

When the lever 87 is in the position shownin Fig. 7, supply pressure will be exerted to operate the roof jack 74y to anchor the plunger 73 in iiXed position. Pressure will be exerted at the right hand end of the plunger 73 to move the cylinder 71 to the right, and when the latter is connected to the mining machine shown in Fig. 1 the latter in its entirety may be transported along the mine wall. `When the cylinder 71 reaches the limit of its right hand movement 7, the roof jack 74 will be struck by the abutment 8O and the movement of the cylinder 71 limited. If the valve 87 is shifted a quarter turn to 'the right the supply pipe 84 will be connected to the the passageway 89 extending through the center of the plunger 81 into the cylinder 82. At thesame time the passageways 86 and 85 will be connected lto the exhaust pipe 90..

The roof jack 74 rwill therefore be released and the pressure exerted in the cylinder 82 will move the plunger 73 and the roof jack 74 toward the right, the weight of themining machine shown in Fig. 1 being sufficient to permit forward shifting movement of the roof jack 74 of relatively less weight. After the roof ack 74 has been shifted toward the right so as to occupy the relative position shown in Fig. 7. the lever 87 may again be moved to the left so as toeifect another forward transporting movement of the mining machine shown in Fig. 1.

While the main purpose of the structure shown in Fig. 7 is to transport the mining mechanism shown in Fig. 1, to new operating positions, it should he noted that such transporting mechanism may also be used to assist the roof jack 9, 10, 13 in holding the base frame 8 and the frame 24 stationary. After the roof aclr 13 has been anchored the roof liack 74 maybe brought up to the position shown in Fig. 7 and also anchored, soxthat during the operation of the dislodging tools the resisting abutment will be multiple, thus serving to more firmly hold the frame 24 in stationary position particularly under those condi-tions where the roof jack 13 alone might tend to slip along the roof and floor.

which communicates withl Ihi greater the back pressure on the roof Jac; exerted on the parts 7 5 and 78 of the roof jack shown in Fig. 7 Therefore, when the mineral to be mined is very'hard, both roof jacks 13 and 74 may be connected in t-andem and both operated to anchored position to hold the frame 24 stationary during the operation of the dislodging mechanism.

Obviously those skilled in the artv may make various changes in the details and arrangement of the parts without departing from the spirit and scope of my invention as defined by the claims hereto appended, and I wish therefore not to be restricted to the precise construction herein disclosed.

I'Iaving thus fully described my invention and illustrated an embodiment thereof, what I desire to secure by Letters Patent of the United States, is:

' I claim 1. In a mining machine, the combination with a base frame adapted to rest on amine floor, of a roof jack mounted thereon for sliding adjustment along arcuate lines, dislodging mechanism, a supporting frame carrying said dislodging mechanism and connected to said roof jack, means for adjusting the position of said dislodging mechanism by moving said supporting frame and said roof jack arcuately relatively to saidhase frame, and means forv operating said dislodging mechanism While said roof ack and said base frame are anchored to act as an abutment.

2. In a mining machine, the combination with a supporting frame, of dislodging mechanism mounted thereon, a base frame having an arcuate support on its upper side, a roof jack having a lower arcuate surface itting the upper side of said base frame, and means for operating said dislo'dging mechanism after said roof jack automatically adjusts itself on said base frame and has been anchored to serve as an abutment.

3. In a mining machine, the combination with a main frame, of means for anchoring the same, dislodging mechanism comprising claw-like spaced-apart penetrating tools adapted to penetrate the coal in its native bed and split the same from a mine vein `f` over a wide area exten-ding from the floor to 74, the greater will be the fluid pressure the roof of the mine chamber, and concentric hydraulic motors one for operating the said tools and the other for moving the mainv frame forward to a new location.

. 4. In a mining machine, the combination with a main frame, of means for anchoring the same, a supplemental frame, additional anchoring mechanism for said supplemental frame, dislodging mechanism mounted on said supplemental frame to move bodily therewith, and hydraulic motor mechanism comprising concentric plungers for effecting ISU the operation of said dislodging mechanism and the movement of the main frame to new operating positions.

5. In a mining machine, the combination with a main frame, of means for anchoring the same, a supplemental frame, additional anchoring mechanism for said supplemental frame, dislodging mechanism mounted on said supplemei'ital frame to move bodily therewith, a hydraulic motor comprising a cylinder' on said main frame, a plunger on said supplemental frame for moving` the latter forward to operate said dislodging mechanism when said main frame is anchored and said supplemental frame is not anchored, and a supplemental hydraulic motor comprising an additional plunger concentric with said first-named plunger and movable within the same to effect forward movement of said main' vframe when the latter is not anchored and while said supplemental frame is anchored.

6. In a mining machine, the combination lwith a base frame adapted to rest on and slide over a mine floor, of a standard mounted on said base frame for Iarcuate adjustments relatively thereto, a main frame mounted on said standard for adj ust-ment in yelevation relative thereto, means for supporting said main frame at adjusted elevation, a supplemental frame, dislodging mechanism mounted on said supplemental frame and comprising a claw-like penetrating tool adapted to enter the coal in its native bed and split the same from the mine vein over a wide area, and means for moving said supplemental 'frame relatively to sai-'l main frame to effect feeding of such (ilislodgiiig mechanism.

7. In a mining machine, the combination with an upright standard, of a hydraulic roof jack for anchoring said standard, a main frame slidable up and down on said standard, a plurality of hydraulic floor jacks for adjusting the elevation of said main frame on said standard, a supplemental frame, dislodging mechanism mounted on said supplemental frame to move bodily therewith, and hydraulic motor mechanism between said main and supplemental frames to etl'ect feeding of said dislodging mechanisni while said standard remains anchored to form an abutment for said main frame.

8. In a mining machine, the combination with a base frame, of an upright standard mounted on said base frame for adjustment in inclination relatively thereto, a main frame mounted on said standard and adjuste-d in elevation relatively thereto, a supplemental frame, dislodging mechanism mounted on said supplemental frame, means for moving said supplemental frame relatively to said main frame to effect feeding of said dislodging mechanism', and means for tilting said main frame together with said standard on sai-d base frame to vary the feeding path of travel of said dislodging mechanism.

9. In a mining machine, the combination with a base frame having an upper surface of the shape of a segment ofa cylinder, of au upright standard having a lower surface litting the upper surface of said base frame and guided to slide relatively to said base frame to vary the elevation of said standard, a hydraulic roof jack for anchoring said standard and said base frame, a main frame connected to said standard and extending approximately horizontally therefrom, a supplemental vframe connected to said .main frame for movement relatively thereto, dislodging mechanism mounted on said supplemental frame to move bodily therewith, means for moving said supplemental frame relatively to said main frame while said standard and said base frame are anchored to act as an abutment for said main frame,

and means for varying the elevation of the dislodging mechanism by tilting said main frame and said standard on said base frame.

l0. In a mining machine, the combination with an upright standard, of a main frame connected thereto for up and down movement thereon, a hydraulic brake for holding said main frame at adjusted elevation, a supplemental frame, dislodging mechanism stationary relative to said supplemental frame to move bodily therewith, hydraulic motor mechanism for moving said supplemental frame to effect feeding of said dislodging mechanism, and hydraulic tloorjack mechamsm for varying the elevation of said main frame on said standard.

l1. In mining apparatus, the combination with an upright standard, of a roof jack for anchoring said standard, a hydraulic motor connected to said standard and extending horizontally therefrom andrcomprising a cylinder and a hollow plunger, a supplemental plunger rigidly connected to said cyinder and adapted to extend into and slide in said hollow plunger, and means for controlling the relative movements of said plungers and said cylinder to effect transleading movements of said plungers alternately.

12. In mining apparatus, the combination with a main frame, of a supplemental frame claw-like dislodging mechanism mounted on said supplemental frame` to move bodily therewith in position to penetrate the coal in its native bed and split` the same from the mine vein over a wide area, a cylinder connected to one of said frames, 'a plunger secured rigidly to said cylinder, a combined supplemental cylinder and plunger rigidly connected to the other frame and fitting into said first-named cylinder and adapted t0 receive said plunger, and means for operating said plungers to secure a translating movement of either plunger while the other reconcentric cylinders.

mains stationary to secure feeding of said dislodging mechanism or re-positioning of the main frame.

13. In a mining machine, the combination lwith a main frame, of a supplemental frame, dislodging mechanism mounted on said supplemental frame to move bodily therewith and comprising a claw-like penetrating tool adapted to penetratethe coal invv its native bed .and split the same from the mine vein over a Wide area, and fluid pressure mechanism comprising concentric plungers for effecting the operationI of said dislodging mechanism. n

14. kIn a mining machine, the combination with supporting framework, of dislodging mechanism mounted thereon comprising claw-like penetrating means adapted to enter the upright face of a mine vein and split the mineral therefrom over a Wide area, and fiuidpressure mechanism comprising concentric plungers for effecting the operation of said dislodging mechanism.

15. AIn a mining machine, the combination with a main frame, of a supplemental frame, dislodging mechanism mounted on said supplemental frame to move bodily therewith, a fluid pressure motor comprising a cylinder on said main frame, a plunger on said sup-v plemental frame for moving the latter forward to operate said dislodging mechanism, and a supplemental fluid-pressure motor comprising an additional plunger concentric with said first-named plunger and movable within the same to effect forward movement of saidinain frame while said supplemental frame is stationary.

16. In a mining machine, the combination with an upright standard, of hydraulic mechanism for anchoring said standard, a main frame adjustable in elevationon'said standard, means adapted 'to engage the floor for adjusting the elevation of said mainframe on said standard, a supplemental frame, dislodging mechanism mounted onsaid supplemental frame to move bodily therewith, and motor mechanism between said main and supplemental frames to effect feeding of said dislodging mechanism while vsaid standard rremains anchored to form an abutment for said main frame- 17. In a mining machine, the combination with supporting framework, lof dislodging mechanism mounted thereon, means` coinprising fluid pressure concentric cylinders for operating said dislodging mechanism, andY means'for positioning said framework, said positioning means comprising lan anchoringfjackconnectedto said fluid pressure 18. In a mining machine, the combina-tion with an abutment comprising a roof jack,of dislodging mechanism, a framevpivoted to said abutment for lateral adjustment on an '5 upright axis, said yframe carrying said dissaid loop lodging mechanism, meansy for operating said dislodging mechanism by pushing the latter along rectilinear lines from said abutment, and a fluid-pressure motor connected to said abutment to move the same together with said frame and said dislodging mechanism'alo-ngr horizontal lines to adjust the position of the dislodging mechanism.

19.- ln a mining machine, the combination with a supporting frame, of dislodging.

ing mechanism, and an additional roof ack to serve as an abutment during the' operation of said fluid pressure mechanism. Y

20.Y The combination with a mining machine, of an abutment comprising a frame adapted to rest on and slide over a mine floor with a roof jack mounted thereon, and

positioning means pivotally connected'toV said abutment and comprising an additional roof jack rconnected to concentric fluid pi'essure cylinders. j

21. In a positioning means for mining machines, the combination with a main frame adapted to beconnected to the mining machine, of a cylinder on said main frame, a ycylinder plunger movable into said cylinder, a roof jack connected to said cyliiider plunger, an additional plunger movable -into said first-named plunger, a frame forV pivotally connecting said additional plunger to said main frame, and means for controlling the application of fluid pressure to said roof jack and in said cylinders and plungers to effect forward movement of the main frame and the mining machine to which it is connected when said last-named roof jack is anchored and to cause said second-named frame to move said roof jack forwardly when released.

22. In positioning mechanism for mining Y machines, the combination with a main frame adapted to 'be connected to a mining machine,

trol of the fluid pressure medium to effect forward movement of theirst-named frame when the roof jack is anchored and to cause extension yto move the roof jack forward when the latter is released.

23. In a mining machine, the combination extendingv to. said loop exmiY with a main frame, ot' a supplemental frame mounted thereon for movement relatively thereto, dislodging mechanism mounted on said supplen'iental frame for movement bodily therewith, spaced-apart fluid pressure floor jacks connected to said supplemental frame in position to adjust the elevation or" both frames and guide the movement ot the supplemental trame along the floor relatively to said main frame, a roof jack on said supplemental trame, fluid pressure mechanism between said main and supplemental frames for eflecting the operation of said dislodging mechanism when said roof jack is released and to ellect forward movement of the main frame to a new position when said roof jack anchors said supplemental frame.

2li. In a mining machine, the combination with a supporting` frame, of a roof jack adapted to act as an abutment, dislodging mechanism mounted on said frame and confined to rectilinear movements during operation, said dislodging mechanism being dependent for its operation on the anchoring of said abutment, means for operating` said dislodging` mechanism along rectilinear lines when said abutment is anchored, a base frame having an upper recess in the shape of a segment of acylinder to receive the correspondingly shaped bottom of said frame to permit adjustment in elevation of said dislodging mechanism, and fluid-pressure motor apparatus connected to said traine to position the abutment when the latter is released.

25. ln mining apparatus, the combination with a supporting trame, of an abutment connected thereto and adapted to be anchored, dislodging mechanism on said frame confined to rectilinear movements during operation, said dislodging apparatus being dependent for its operation on the anchoring of said abutment, and lluid-pressure apparatus pivotally connected to said abutment for positioning the latter and said frame when said abutment is released from its anchored position. p

26. A mining machine comprising a supporting frame, an abutment connected to said frame and adapted to be anchored in a mine chamber,A dislodging mechanism f mounted on said frame to operate by rectilinear movement against the action of said abutment, said dislodging mechanism being dependent for its operation onthe anchoring of said abutment, additional anchoring mechanism adapted to rest by its own weight on a flat floor and be projected against the roof of the mine chamber to form another abutment distant from said first-named abutment but connected in tandem to the latter, powerful propelling mechanism comprising a longitudinally extending horizontal fluidpressure motor connected between said abutments, and means connected between said motor and said additional anchoring mechanism to cause the latter to be anchored more a new location said first-named abutment and said frame.

27. ln a mining machine, the combination with a supporting frame, of a fluid-pressure operated anchoring device, dislodgingmechanism mounted on said frame, an additionalV fluid-pressure operated anchoring device, fluid-pressure propelling mechanism comprising a hollow piston serving to connect both of said anchoring devices in tandem, a fluid passageway extending through said hollow piston from said fluid-pressure propelling mechanism to said additional anchoring device, and means for supplying al fluid-pressure medium to said additional anchoring device and to said propelling mechanism simultaneously to'eflect movement of said frame and said first-named anchoring device together with said dislodging mechanism.

28. ln a mining' machine, the combination with a supporting frame, of a. fluid-pressure operated anchoring device adapted to form an abutment, dislodging mechanism adapted to operate by rectilinear movement Valong the mine wall and dependent for its operation on the anchoring of said abutment, an I additional fluid-pressure operated anchoring device adapted to form an additional abutment, a fluid-perssure motor comprising a cylinder and' a piston connecting said abutments in tandem, said piston having a fluid passageway extending therethrough to said first-named fluid-pressure operated anchoring device, an operating connection bet veen said piston and said additional abutment, and means to establish direct communication between said cylinder and said additional fluid-pressure operated anchoring device through the passageway in said piston and said operating connection and to effect 11e-positioning of said frame together with said dislodging mechanismV and said first-named abutment.

29. ln a mining machine, the combinationV with a supporting frame, of an abutment therefor, dislodging mechanism mounted on said frame for rectilinear operationalong a mine wall, said dislodging mechanism being dependent for its operation uponthe anchoring of said abutment, a fluid-pressure operated anchoring device adaptedrto form an additional abutment, a fluid-pressure motor connecting said abut-ments in tandem and comprisinga hollow piston with a fluid passageway extending along the walls thereof,

an operating connection between said piston and said additional abutment, and means for connecting the fluid passageway in said piston to the fluid-pressure chamber of the said motor mechanism comprising a within a cylinder and the latter fluid-pressure operated anchoring device to eiiect re-positioning ot said frame together with said dislodging apparatus and said first-named abutment.

30. In a mining machine, the combination with a supporting trame, of an abutment therefor, dislodging mechanism mounted on said trame for rectilinear operation, a supplemental trame connected to said firstnamed iframe, a fluid-pressure operated anchoring device mounted on said supplemental frame and adapted to form an abutment therefor, a duid-pressure motor connecting said abutments in tandem and comprising a cylinder with a piston movable within said cylinder, and a. fluid-pressure passageway extending trom said cylinder through said piston to the fluid-pressure chamber of said fluid-pressure anchoring device to establish fluid-pressure communication between said cylinder and the fluid-pressure chamber of the anchoring device to etfect anchoring of said abutment on the supplemental frame and the operation o'l said motor to move the first-named frame and its abutment together with said dislodging mechanism to a new location.

3l. In a mining machine, the combination with a main trame, ot an abutment therefor, dislodging apparatus mounted on said trame, a supplemental Ytrame pivotally connect-ed to said main trame for lateral adjustment ot the dislodging apparatus on an upright axis to various angular positions relative to said main frame, a fluid-pressure operated anchoring device adapted to orm an abutment for said supplemental trame, a Huid-pressure operated motor on said supplemental trame and'liaving passageways connected directly to said fluid-pressure operated anchoring device, and means tor simultaneously controlling the operation ot said fluid-pressure operated anchoringrdevice and the operation of said anchoring device to act as an abutment for said motor and to cause said motor to move the main trame together with its abutment and said dislodging apparatus to a new position. v e

32. In mining apparatus, the combination with a mining machine, of a hydraulically operated roof jack to serve as an abutmenttheretor, an additional hydraulically operated roeic jack spaced behind said firstnamed rooic jack in tandem therewith, hydraulically operated motor mechanism ccnnecting said root jacks in tandem and serving to advance the machine when saidl tirsL named root jack is released, said secondnamed root jack comprising a cylinder and piston being a piston within another cylinder, connections said motor to cause comprising a fluid-pressure passageway to eiiect a variation ot pressure used to operate saidv second-named roof jack in accordance vith the lpressure for operating the advancing mechanism, and means for controlling the operation ot said motor mechanism to secure advancing of either the mining mechanism or the second-named root jack.

In mining apparatus, the combination with a mining machine, of an abutment there-for, second abutment spaced from the first-named abutment, a fluid-pressure operated motor between vsaid abutments, said motor comprising a piston within a cylinder which serves as a .piston within another cylinder, the latter cylinder being connected to one oi said abutments and said lirst-named piston being connected to the other abutment, and means for controlling said motor toV advance the first-named abutment together with said mining apparatus while the second-named abutment is anchored, and to advance the second-named abutment when the first-named abutment is anchored.

In a mining machine, the combination with mining` mechanism, of an abutment therefor, an anchor arranged to engage the `floor and root of the mine chamber, said anchor comprising an upright hydraulic cylinder and a plunger movable therein, a power device for advancing said mining mechanism together with said abutment, said power device comprising a root jack having an additional hydraulic. cylinder with a piston therein, a trame 'for guiding said roof jack and holding it upright when released, means for introducing fluid into said additional cylinder to operate said power device, and a permanent connection between said cylinders and extending through said piston to introduce liquid pressure into the upright cylinder from said additional cylinder and thereby increase the pressure exerted by said anchor on the floor and roof in accordance with the torce exerted by said power device for advancing the mining mechanism and its abutment. n

In a mining machine, the combination with a mainframe, of a supplemental frame, dislodging mechanism mounted on said supplemental frame, a fluid-pressure motor' comprising a cylinder on one of said frames, a. plunger on the other frame, means for controlling said motor to operate said dislodging mechanism, and a supplemental Afinid-pressure motor concentric with said first-named motor 'to effect advance movement ot the main trame while said supplemental trame is stationary.

In testimony whereof I have signed my name to this specification on this 22d day of October, A. D. 1921.

. EDMUND C. MORGAN. 

